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lpfc: fix locking issues with abort data paths

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Fix locking issues with abort data paths

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: Dick Kennedy <dick.kennedy@emulex.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart 2014-09-03 12:57:30 -04:00 committed by Christoph Hellwig
parent 12838e74f5
commit 9bd2bff5e7
3 changed files with 83 additions and 48 deletions
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12
drivers/scsi/lpfc/lpfc_scsi.c
View File

@ -3466,7 +3466,7 @@ lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
*/
if ((phba->cfg_fof) && ((struct lpfc_device_data *)
scsi_cmnd->device->hostdata)->oas_enabled)
lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_OAS;
lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
return 0;
}
@ -3606,6 +3606,14 @@ lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
*/
iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
/*
* If the OAS driver feature is enabled and the lun is enabled for
* OAS, set the oas iocb related flags.
*/
if ((phba->cfg_fof) && ((struct lpfc_device_data *)
scsi_cmnd->device->hostdata)->oas_enabled)
lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
return 0;
err:
if (lpfc_cmd->seg_cnt)
@ -4876,6 +4884,8 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
/* ABTS WQE must go to the same WQ as the WQE to be aborted */
abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
if (iocb->iocb_flag & LPFC_IO_FOF)
abtsiocb->iocb_flag |= LPFC_IO_FOF;
if (lpfc_is_link_up(phba))
icmd->ulpCommand = CMD_ABORT_XRI_CN;

118
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -8753,6 +8753,37 @@ lpfc_sli_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
return 0;
}
int
lpfc_sli_calc_ring(struct lpfc_hba *phba, uint32_t ring_number,
struct lpfc_iocbq *piocb)
{
uint32_t idx;
if (phba->sli_rev == LPFC_SLI_REV4) {
if (piocb->iocb_flag & (LPFC_IO_FCP | LPFC_USE_FCPWQIDX)) {
/*
* fcp_wqidx should already be setup based on what
* completion queue we want to use.
*/
if (!(phba->cfg_fof) ||
(!(piocb->iocb_flag & LPFC_IO_FOF))) {
if (unlikely(!phba->sli4_hba.fcp_wq))
return LPFC_HBA_ERROR;
idx = lpfc_sli4_scmd_to_wqidx_distr(phba);
piocb->fcp_wqidx = idx;
ring_number = MAX_SLI3_CONFIGURED_RINGS + idx;
} else {
if (unlikely(!phba->sli4_hba.oas_wq))
return LPFC_HBA_ERROR;
idx = 0;
piocb->fcp_wqidx = idx;
ring_number = LPFC_FCP_OAS_RING;
}
}
}
return ring_number;
}
/**
* lpfc_sli_issue_iocb - Wrapper function for __lpfc_sli_issue_iocb
* @phba: Pointer to HBA context object.
@ -8778,61 +8809,42 @@ lpfc_sli_issue_iocb(struct lpfc_hba *phba, uint32_t ring_number,
int rc, idx;
if (phba->sli_rev == LPFC_SLI_REV4) {
if (piocb->iocb_flag & LPFC_IO_FCP) {
if (!phba->cfg_fof || (!(piocb->iocb_flag &
LPFC_IO_OAS))) {
if (unlikely(!phba->sli4_hba.fcp_wq))
return IOCB_ERROR;
idx = lpfc_sli4_scmd_to_wqidx_distr(phba);
piocb->fcp_wqidx = idx;
ring_number = MAX_SLI3_CONFIGURED_RINGS + idx;
} else {
if (unlikely(!phba->sli4_hba.oas_wq))
return IOCB_ERROR;
idx = 0;
piocb->fcp_wqidx = 0;
ring_number = LPFC_FCP_OAS_RING;
}
pring = &phba->sli.ring[ring_number];
spin_lock_irqsave(&pring->ring_lock, iflags);
rc = __lpfc_sli_issue_iocb(phba, ring_number, piocb,
flag);
spin_unlock_irqrestore(&pring->ring_lock, iflags);
ring_number = lpfc_sli_calc_ring(phba, ring_number, piocb);
if (unlikely(ring_number == LPFC_HBA_ERROR))
return IOCB_ERROR;
idx = piocb->fcp_wqidx;
if (lpfc_fcp_look_ahead) {
fcp_eq_hdl = &phba->sli4_hba.fcp_eq_hdl[idx];
pring = &phba->sli.ring[ring_number];
spin_lock_irqsave(&pring->ring_lock, iflags);
rc = __lpfc_sli_issue_iocb(phba, ring_number, piocb, flag);
spin_unlock_irqrestore(&pring->ring_lock, iflags);
if (atomic_dec_and_test(&fcp_eq_hdl->
fcp_eq_in_use)) {
if (lpfc_fcp_look_ahead && (piocb->iocb_flag & LPFC_IO_FCP)) {
fcp_eq_hdl = &phba->sli4_hba.fcp_eq_hdl[idx];
/* Get associated EQ with this index */
fpeq = phba->sli4_hba.hba_eq[idx];
if (atomic_dec_and_test(&fcp_eq_hdl->
fcp_eq_in_use)) {
/* Turn off interrupts from this EQ */
lpfc_sli4_eq_clr_intr(fpeq);
/* Get associated EQ with this index */
fpeq = phba->sli4_hba.hba_eq[idx];
/*
* Process all the events on FCP EQ
*/
while ((eqe = lpfc_sli4_eq_get(fpeq))) {
lpfc_sli4_hba_handle_eqe(phba,
eqe, idx);
fpeq->EQ_processed++;
}
/* Turn off interrupts from this EQ */
lpfc_sli4_eq_clr_intr(fpeq);
/* Always clear and re-arm the EQ */
lpfc_sli4_eq_release(fpeq,
LPFC_QUEUE_REARM);
/*
* Process all the events on FCP EQ
*/
while ((eqe = lpfc_sli4_eq_get(fpeq))) {
lpfc_sli4_hba_handle_eqe(phba,
eqe, idx);
fpeq->EQ_processed++;
}
atomic_inc(&fcp_eq_hdl->fcp_eq_in_use);
}
} else {
pring = &phba->sli.ring[ring_number];
spin_lock_irqsave(&pring->ring_lock, iflags);
rc = __lpfc_sli_issue_iocb(phba, ring_number, piocb,
flag);
spin_unlock_irqrestore(&pring->ring_lock, iflags);
/* Always clear and re-arm the EQ */
lpfc_sli4_eq_release(fpeq,
LPFC_QUEUE_REARM);
}
atomic_inc(&fcp_eq_hdl->fcp_eq_in_use);
}
} else {
/* For now, SLI2/3 will still use hbalock */
@ -9715,6 +9727,7 @@ lpfc_sli_abort_iotag_issue(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *abtsiocbp;
IOCB_t *icmd = NULL;
IOCB_t *iabt = NULL;
int ring_number;
int retval;
unsigned long iflags;
@ -9755,6 +9768,8 @@ lpfc_sli_abort_iotag_issue(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
abtsiocbp->fcp_wqidx = cmdiocb->fcp_wqidx;
if (cmdiocb->iocb_flag & LPFC_IO_FCP)
abtsiocbp->iocb_flag |= LPFC_USE_FCPWQIDX;
if (cmdiocb->iocb_flag & LPFC_IO_FOF)
abtsiocbp->iocb_flag |= LPFC_IO_FOF;
if (phba->link_state >= LPFC_LINK_UP)
iabt->ulpCommand = CMD_ABORT_XRI_CN;
@ -9771,6 +9786,11 @@ lpfc_sli_abort_iotag_issue(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
abtsiocbp->iotag);
if (phba->sli_rev == LPFC_SLI_REV4) {
ring_number =
lpfc_sli_calc_ring(phba, pring->ringno, abtsiocbp);
if (unlikely(ring_number == LPFC_HBA_ERROR))
return 0;
pring = &phba->sli.ring[ring_number];
/* Note: both hbalock and ring_lock need to be set here */
spin_lock_irqsave(&pring->ring_lock, iflags);
retval = __lpfc_sli_issue_iocb(phba, pring->ringno,
@ -10068,6 +10088,8 @@ lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
abtsiocb->fcp_wqidx = iocbq->fcp_wqidx;
if (iocbq->iocb_flag & LPFC_IO_FCP)
abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
if (iocbq->iocb_flag & LPFC_IO_FOF)
abtsiocb->iocb_flag |= LPFC_IO_FOF;
if (lpfc_is_link_up(phba))
abtsiocb->iocb.ulpCommand = CMD_ABORT_XRI_CN;
@ -10167,6 +10189,8 @@ lpfc_sli_abort_taskmgmt(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
abtsiocbq->fcp_wqidx = iocbq->fcp_wqidx;
if (iocbq->iocb_flag & LPFC_IO_FCP)
abtsiocbq->iocb_flag |= LPFC_USE_FCPWQIDX;
if (iocbq->iocb_flag & LPFC_IO_FOF)
abtsiocbq->iocb_flag |= LPFC_IO_FOF;
if (lpfc_is_link_up(phba))
abtsiocbq->iocb.ulpCommand = CMD_ABORT_XRI_CN;

1
drivers/scsi/lpfc/lpfc_sli.h
View File

@ -79,6 +79,7 @@ struct lpfc_iocbq {
#define LPFC_FIP_ELS_ID_SHIFT 14
#define LPFC_IO_OAS 0x10000 /* OAS FCP IO */
#define LPFC_IO_FOF 0x20000 /* FOF FCP IO */
uint32_t drvrTimeout; /* driver timeout in seconds */
uint32_t fcp_wqidx; /* index to FCP work queue */